Help reading a 9 track tape

Bill Gunshannon bill.gunshannon at
Mon Aug 2 15:14:11 CDT 2021

On 8/2/21 12:19 PM, Paul Koning via cctalk wrote:
>> On Aug 2, 2021, at 11:11 AM, James Liu via cctech <cctech at> wrote:
>> Thanks for feedback and offers to assist.  I received the tape from
>> one of the maintainers of Schoonship at CERN, and it was probably made
>> around 1978 at SLAC.
>> For some background, Tini Veltman developed Schoonship in the 1960's
>> at CERN on the CDC 6600.  My understanding is that he more or less
>> insisted on coding in assembly since he thought FORTRAN or other high
>> level languages would just get in the way and slow things down.
> Depending on what he was trying to do that may well be a valid assessment.  CDC Fortran was known to be pretty good, but Fortran  is not the obvious answer for implementing interpreters or other language processors, which this sounds like.

Some might argue with you about that.  PL/M was done in Fortran IV.


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